Good rectifying current-voltage characteristics and nanosecond photoelectric effects are observed in the p-n hereto junctions of La0.9Sr0.1 MnO3/SrNb0.01 Ti0.99O3 fabricated by laser molecular beam epitaxy. The rise t...Good rectifying current-voltage characteristics and nanosecond photoelectric effects are observed in the p-n hereto junctions of La0.9Sr0.1 MnO3/SrNb0.01 Ti0.99O3 fabricated by laser molecular beam epitaxy. The rise time is about 26ns and the full width at half maximum is about 125ns for the open-circuit, photovoltaic pulses when the La0.9Sr0.1MnO3 film in the heterojunction is irradiated by a laser operated at wavelength 308nm with pulse duration of about 25 ns. A qualitative explanation is presented, based on an analysis of the photoelectric effect of p-n hereto junction.展开更多
Nanometer oxides La1-xSrxMnO3 were synthesized by absolute alcohol as solvent.The desired metal cations were chelated in a solution using citric acid as the chelating agents.In order to get the optimum preparation con...Nanometer oxides La1-xSrxMnO3 were synthesized by absolute alcohol as solvent.The desired metal cations were chelated in a solution using citric acid as the chelating agents.In order to get the optimum preparation condition for La1-xSrxMnO3,the pH of primal commix solution,the molar fraction of citric acid and baking temperature of predecessor block were researched by orthogonal test design method with different x.The thermal decomposition of the metal carboxylate precursor gels was studied by TG/DTA and the products derived from calcinations of the gels were characterized by XRD and TEM.The polarization curves were acquired on an electrochemical work station(LK98)and the discharge curves were acquired on a testing instrument of batteries(DC-5)with a constant current discharge under 120 mA/cm2.The results reveal that the nanometer oxides can be achieved by absolute alcohol as solvent and it has better catalytic activity.展开更多
基金Project Supported by the National Natural Science Foundation of China （Grant No 10334070） and by the National Key Basic Research ＆ Development Programme of China （Grant No 2004CB619004）.
文摘Good rectifying current-voltage characteristics and nanosecond photoelectric effects are observed in the p-n hereto junctions of La0.9Sr0.1 MnO3/SrNb0.01 Ti0.99O3 fabricated by laser molecular beam epitaxy. The rise time is about 26ns and the full width at half maximum is about 125ns for the open-circuit, photovoltaic pulses when the La0.9Sr0.1MnO3 film in the heterojunction is irradiated by a laser operated at wavelength 308nm with pulse duration of about 25 ns. A qualitative explanation is presented, based on an analysis of the photoelectric effect of p-n hereto junction.
文摘Nanometer oxides La1-xSrxMnO3 were synthesized by absolute alcohol as solvent.The desired metal cations were chelated in a solution using citric acid as the chelating agents.In order to get the optimum preparation condition for La1-xSrxMnO3,the pH of primal commix solution,the molar fraction of citric acid and baking temperature of predecessor block were researched by orthogonal test design method with different x.The thermal decomposition of the metal carboxylate precursor gels was studied by TG/DTA and the products derived from calcinations of the gels were characterized by XRD and TEM.The polarization curves were acquired on an electrochemical work station(LK98)and the discharge curves were acquired on a testing instrument of batteries(DC-5)with a constant current discharge under 120 mA/cm2.The results reveal that the nanometer oxides can be achieved by absolute alcohol as solvent and it has better catalytic activity.
